Higher-accuracy van der Waals density functional

Kyuho Lee, Éamonn D. Murray, Lingzhu Kong, Bengt Lundqvist, David C. Langreth

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Abstract

We propose a second version of the van der Waals density functional of Dion et al. [Phys. Rev. Lett. 92, 246401 (2004)], employing a more accurate semilocal exchange functional and the use of a large-N asymptote gradient correction in determining the vdW kernel. The predicted binding energy, equilibrium separation, and potential-energy curve shape are close to those of accurate quantum chemical calculations on 22 duplexes. We anticipate the enabling of chemically accurate calculations in sparse materials of importance for condensed matter, surface, chemical, and biological physics.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume82
Issue number8
Pages (from-to)081101
ISSN0163-1829
DOIs
Publication statusPublished - 2010

Bibliographical note

Copyright 2010 American Physical Society

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